EdbusContainer.h

/*
 * $Id: EdbusContainer.h 2839 2009-09-28 11:36:20Z karijes $
 *
 * D-BUS stuff
 * Copyright (c) 2008 edelib authors
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef __EDELIB_EDBUSCONTAINER_H__
#define __EDELIB_EDBUSCONTAINER_H__

#include "List.h"

EDELIB_NS_BEGIN

#ifndef SKIP_DOCS
template <typename T>
struct EdbusContainerImpl {
        list<T> lst;
        unsigned int ref;
};
#endif

template <typename T>
class EdbusContainer {
public:
        typedef typename list<T>::iterator iterator;

        typedef typename list<T>::const_iterator const_iterator;

#ifndef SKIP_DOCS
        typedef EdbusContainerImpl<T> EdbusContainerPrivate;
#endif

protected:
        EdbusContainerPrivate* impl;

        void dispose(void) {
                if(!impl)
                        return;

                delete impl;
                impl = 0;
        }

        void unhook(void) {
                E_ASSERT(impl != NULL);

                if(impl->ref == 1)
                        return;

                EdbusContainerPrivate* new_one = new EdbusContainerPrivate;
                new_one->ref = 1;

                /* 
                 * Copy the content
                 *
                 * edelib::list does not have implemented copy operator
                 * and that is the way I like
                 */
                if(impl->lst.size() > 0) {
                        iterator it = impl->lst.begin(), it_end = impl->lst.end();

                        while(it != it_end) {
                                new_one->lst.push_back(*it);
                                ++it;
                        }
                }

                impl->ref--;
                impl = new_one;
        }

        EdbusContainer() : impl(0) {
                impl = new EdbusContainerPrivate;
                impl->ref = 1;
        };

        EdbusContainer(const EdbusContainer& other) {
                if(this == &other)
                        return;

                impl = other.impl;
                other.impl->ref++;
        }

        ~EdbusContainer() {
                impl->ref--;

                if(impl->ref == 0)
                        dispose();
        }

        EdbusContainer& operator=(const EdbusContainer& other) {
                other.impl->ref++;
                impl->ref--;

                if(impl->ref == 0)
                        dispose();

                impl = other.impl;
                return *this;
        }
};

EDELIB_NS_END
#endif